Sling



Dec. 8, 1942. w, HOBBS JR 2,304,305

SLlNG Filed Jan. 10, 1942 2 Sheets-Sheet l INVENTOR ff/1.4M? /%5@5, Jr.

l JQWFQNEYS Patented Dec. 8, 1942 I SLING William Hobbs, Jr., Morrisville, Pa., assignor to John A. Roebling's Sons Company, Trenton,

N. J., a corporation of New Jersey Application January 10, 1942, Serial No. 426,311

.9 Claims.

I This invention relates to rope slings, especially wire rope slings. i

Among the objects of the invention are to provide a rope sling of novel construction and in cluding modified Flemish eyes, the sling being exceptionally flexible, non-kinking and long wearing and including an eye construction'having advantages of strength and ease of sling assembly.

The invention comprises the series of rope groups and tie wires and their association with each other at the ends of the sling to form the eyes, as hereinafter described and claimed.

In the drawings:

Figure 1 is a plan view of one form of sling Figure 2 is an enlarged fragmentary view of part of Figure 1 including the sling throat;

Figure 3 is an enlarged sectional view taken on line 3-4 of Figure 1; a Figure 4 is a view of another sling arrangement according to the invention, having a greater number of strand groups than Figure 1 and showing a hook associated with one of the eyes;

Figure 5 is an 1 enlarged diagrammatic view through one of the eyes of Figure 4, taken on the line 5-5 thereof; 1 Figure 6 is a view similar to Figures 3 and 5 but showing a different number of sling strands and their arrangement in an eye portion; and

Figure '7 is an enlarged fragmentary view of the sling construction of Figure 4 showing especially the arrangement of the group strands and the tie wire strands in the sling body and at the two throats.

It will be understood that the strand groups and the strands themselves in all the figures are shown separated more or less for purposes of illustration.

Referring in detail to the accompanying drawings,and especially to Figures 1, 2 and 3, the sling here shown comprises two distinct and separate strand groups, each of which is associatedwith the other by means oi-a pair of tie wires or strands. As viewed in Figures 1 and 2 the left hand strand group is composed of the pair of wires or strands H and i2, and th right hand rope group is composed of the pair .01 wires or strands l4 and i5. As shown. in the drawings, each of these groups, 1. e., the group composed of strands H and i2 and the group composed of strands I4 and It, continues its own identity and extends longitudinallythroughout the body of the sling to and into the throat portions.

These two strand groups are associated with each other by tie wires or strands. In the present example or the invention'there are two strand groups, each group composed of two strands, and there are two tie wires or strands ii and IB. At the throats, as here shown, the'tie wire or strand ll is associated with the strands H and 52 forming one group, and the tie wire or strand i8 is associated with the strands and I5 forming the other group. Between th throats, throughout the length of the sling. each tie wire passes from one group across to the other, and in the arrangement shown, over, around and under it, and up between the groups to, over, around and under the first group. This arrangement continues throughout the sling body from one throat to the other, and is such that the two tie wires or strands cross each other repeatedly between the rope groups as each passes from one group to the other. The strands of the two groups are shown as twisted differently in the sling body, one group being right lay and the other left lay, this being usual to avoid the tendency to rotation,

but this is not essential and may be varied. Referring now to the eye construction shown in Figures 1 and 3, the two throat portions leading up to and forming each eye, are each composed of one rope group and one tie wire on strand. Thus, in the throat shown in- Figures 1 and 2, one throat portion comprises the rope group consisting of the group strands H an H and,the tie wire 17, and the other" throat por ion consists of the other group strands l4 and I5 and the other tie wire or strand I8. I

The eye loop at each end or the sling includes all the group strands and both tie wires. In this embodiment or the invention, an independent piece of strand U is used as a center, as shown in Figure 3. This center strand is used only in so the eye loop portion, throughout which it extends from rope button 20 to rope button 2 I.

In the arrangement shown, the rope group strands H and I5 and tie wire strand l8 are twisted right hand, and'the rope group strands H and it and tie wire strand H are twisted left hand. In forming the eye one strand, for example H, is laid around the center strand (Figure 3) 'irom button 20 to button 2 I; then the opposite side strand II is laid next to it from button 2! to button 20. This process is continued so that the strands are laid alternately around the loop'center strand first from one side and then the other. This is the preferred arrange-' ment but may be varied, Thus under each of 55 buttons 10 and 2! there are three sling strand sling of Figure tion shown. It will be understood, however, that the invention includes a sling having this eye construction at only one end, the other end of the rope body being formed or provided with an eye or in any other suitable manner but preferably the sling has suitable eyesat both ends.

-It will be seen that, as shown, group strands II and I2 and the tie strand i'i extendfrom the upper eye button 20 of Figure 1 around the loop of the eye, through upper eye button 2|, down the length of the sling, through lower eye button 22, and around the loop of the lower eye,

ending within lower eye button 23. The group strands l4 and I5 and the tie strand 18, extend from within upper, eye button 2|, around the upper eye loop, through button 20, down the lengthof the sling, through lower eye button 23, and

at the throat, passes over strand group i, crosses tie strand 60 between groups i' and 2, passes under, around and over strand group 2, thence crosses tie strand 60 between the groups as be fore, passes under, around and over strand group I and so continues throughout the length of the sling body to the other throat.

Tie strand 63, associated with strand group 4 at the throat, passes over strand group 4, between strand groups 3 and 4, under, around and over strand group 3, between strand groups 3 and 4 again, under, around and over strand group 4 and so on to the other throat of the sling.

' Referring now to the tie strands associating strand groups 2 and 3 with each other, tie strand 66, associated with strand group 2 at the top, passes under strand group 2, thence between strand groups 2 and 3, over, around, and under group 3, thence between groups 2 and 3, over,

around and under group 2, and so on to the other throat.

around-the loop or the lower eye, ending within lower eye button 22.

'Ihek sling shown in Figures 1 to 3 has only two'strand groups and this is preferred, where the strength required can be secured with strands of the desired flexibility. The number of its end groups in the group may be increased, however,

to secure any strength required with the desired flexibility.

7 Referring to Figures 4, 5 and 7, the sling here shown embodies the same broad invention as the 1, but differs from it in two principal respects, one being that it shows four strand groups instead or two, and the other being that the eye loops are composed only of the strands Tie strand 61, associated with group 3 at the throat, passes under group 3, thence crossing tie strand 66 between strand groups 3 and 2,. over, around and under strand group 2, thence crossing tie strand 66 again between the two groups, and so on to the other throat.

At the other throat, shown at the right hand side of Figure 7, the tie strands are associated again with the-groups with which they started, but this is not essential.

Referring now to the eye loops of Figure 4, their structure is shown in cross section in Figure 5.

Each eye loop contains all the strands forming the sling body, the tie strandsas well as the strand groups.

used in the sling body without any extra. center strand'or wire in the eye loops. The. sling of Figure 4 is composed of two outside strand groups I and 4, and two inside groups 2 and 3, all extending longitudinally from end to end of the sling body. The sling of Figure 4 has a large eye 5 and a smaller eye I, the latter being shown as provided with a hook 8. Any

other suitable fitting may readily be threaded on one or both eyes.

Outside strand group i is composed of the pair of twisted strands 5| and 52; outside strand group 4 is composed of the pair of twisted strands 54 and 55. Inside strand groups 2 and 31 are, in

At the throat of eye loop 5, tie strand 62 is associated with strand group 1, tie strands 6i and 61 are associated with group 3, and all enter the eye loop button I I. Similarly, tie strand 63 is associated with group 4, tie strands 60 and 68 are associated with group 2, and all enter the eye loop button 12.

The arrangement of all the strands in the sling in the eye loop portions may be as shown in Figure 5. As here shown, the structure is such as to form a central core of three of the strands, each of which is preferably associated with a diflerent group at the throat. As illustrated, the strands 3, 52 and 55 compose the central core, andaround this core are twisted the remaining strands in the order, for example,.shown-in Figure 5.

From this it will be seen that the group' I strands 5i and 52, group strand 3, tie strand 62 the structure of Figures 4 and 7, composed of the single strands as shown.

Throughout the main body of strands join the strand groups together. As shown in the left hand portion of Figure ,7, tie strand 6t passes over strand group 2, between group 2 and group I, under, around and over group i, thence between groups I and 2,.under,

, around and over group 2, thence between the two throughout the length of the sling-body to the.

other throat.

Tie strand 62, associated with strand group i the sling, between the two throats at the ends, tie wires or and tie strands 6| and, El all have ends within eye loop button 12, and all pass around loop .5,

, through eye loop button I I, thence down the sling throughout its length as described, into and through eye loop button 14 and around the eye loop I, and have their ends in eye loop button 13.

Similarly, group 4 strands 54 and 55, group strand 2, tie strand 6 3 and tie-strands 60 and 66 have ends within eye loop button ii of eye loop 5,

pass around eye loop 5 into and through eye loop button l2, thence down the sling as described, into and through eye loop button I3 of eye loop I, around eye loop l and have their ends in eye loop button M.

As the strand twists were described in connection with Figure 1, the strands of the sling or Figure 4 entering eye buttons 72 and T3 are twisted right hand, and the strands entering eye buttons ii and 14 are twisted left hand.

From the foregoing, and especially from Figures 3 and 5, it will be apparent that the arrangeasoasoe 3 ment of strands in the eye loops may be varied while still using all of the sling strands in each eye loop as described. It is also evident that the invention is not limited to the particular number of sling strand groups or the number of strands in each sling strand group. extending throughout the sling body, although the arrangement shown of two twisted strands in each group is preferred. For example, there may be three strand groups,

each group of two strands with a separate eye center, as shown in the eye loop cross section of Figure 6. ,As shown in this figure a six strand rope center formed of strands 8| with its own core 82 may be used from one button to the other in each'eye loop, and around the six strand center ,may be twisted all the nine sling strands 83,

which may be combined in the sling body in substantially the same manner as in Figure 7 one of the inside strand groups being omitted.

it will/be understood that, in this example, four strandsfroni the sling body enter one eye loop J button of an eye and the remaining five strands enter the other button of. that eye.

a What is claimed is:

1. A sling including a series of twisted sling strand groups extending longitudinally through out the sling body, tie strands tying each strand group toeach adjacent strand group and extending frorhseachr strand group *to and around each adjacent strand group andback again throughout the slingjbody, said sling having an eye structurei including two throat portions and a loop portion, a eluded inone or the other of the two throat por' tionslof the eye, and the loop portion of the eye including all of the strands of the sling, the

strandsin each" throat portion of the eye extending around the loopthereof to the other throat portion and at-button; at eaohend of the loop enclosing the ends of the strands from the oppo- 4.0 site throat portion.

2. Asling including a series of twisted strand groups extending longitudinally throughout the sling body, tiestrands tying each strand group to each adjacent strand group and extending from each strand group to and around each adjacent strand group and back again throughout the sling body, said sling having an eye structure including two throat portions and a loop portion,

one of the throat portions having its strands twisted right hand the other left hand, all of the from each strand group to and around each adjacent strand group and back again throughout the sling body, said sling having an eye structure comprising a pair of throat portions and an eye ofthe strands of the sling being me loop portion joining them, all the strands of the sling being comprised in one throat portion or the other, all thestrands of each throat portion extending throughout the eye loop to the other throat portion, a button at each end of the eye p enclosing the ends of the strands from its opposite throat portion, and an auxiliary strand center within the eye loop strands extending from one eye loop buttonto the other and having an end enclosed within each button.

4. A sling including a series of twisted strand groups extending longitudinally throughout the sling body, tie strands tying each "strand group to each adjacent strand group and extending from each strand group to and around each adjacent strand group and back again throughout the sling body, said sling having an eye structure including all the group strands and all the tie strands of the sling, some of the sling strands composing the eye lying within the others and forming an eye loop center.

5. A rope sling eye having two separate strand groups at the base of the eye with the strands of the groups layed up together to form the eye and a button on each group enclosing the strands of one group at the base of the eye and the ends of the strands of the other group.

6. A rope sling eye having two separate strand groups at the base of the eye with the strands of the groups laye'd up together to form the eye on a center other than the group strands and a button on, each: group enclosingthe strands of one group at the base of the eye and the ends of the strands of the other group and of the center.

71 A rope sling eye' having two separate strand groups at the base of. the eye with the strands of the groups layed'up together on a center formed by someoithe group strands to form the eye and a button oneach group enclosing the strands of one group at the base of the eye and the ends of the strands of the other group.

ing an eye structure formed from the group strands and tie strands of the sling.

9. A sling including a series of pairs of twisted strands forming sling strand groups extending substantially straight through the sling body, and a series of tie strands tying together the sling strand groups, each to its adjacent sling strand group, said tie strands extending from each strand group to and around each adjacent strand group and back again throughout the sling body, said sling having an eye structure formed from the group strands and tie strands of the sling.

WILLIAM House, on. 

